M4-style receiver extension tube has six precision-machined notches on the underside for maximum flexibility in setting length-of-pull with adjustable buttstocks. Lets you install a mil-spec stock on a civilian carbine or refit a rifle with an A2-style fixed buttstock with an adjustable M4 stock. Outside diameter of tube is machined approximately .003" oversized for snug, rattle-free fit of stocks designed for mil-spec extensions. Lightly sand interior of stock to get just the right combination of snugness and freedom over movement. Machined from a lightweight aluminum extrusion before hardcoat anodizing with a wear-resistant matte black finish. Rifle conversion also requires a carbine action spring and buffer, available separately.
Customer ratings for D.S. ARMS RECEIVER EXTENSION TUBE
Number of ratings: 20
From brownells.com: 20
Average rating: 4.2
Works with my Magpul Mil Spec MOE Stock(25/12/2009)
Great price, good finish and fit. Works well with my Magpul Mil Spec MOE stock.
Good for price!(04/03/2010)
This is a great stock for the price. However, my only complaint is for Magpul friction lock users. I have a Magpul ACS stock and the friction lock will not lock the sotck up as tight as other stocks. If you don't care about a little wiggle it is no big deal. If you want the Magpul stock to be solid you might try another stock.
Great product(12/03/2010)
I purchased two of these for builds on Aero Precision lowers. The parts were cleanly machined and nicely finished. Threaded perfectly to receiver without play. Best part is that they don't cost an arm an a leg in comparison to other manufacturers offering the same product that does the same job. I will be purchasing more and would certainly recommend. The parts seem to keep in-step to what I have read about DSA quality of manufacturing. Thank you.
Love this Tube(09/04/2010)
I just used this tube for my AR build. It worked perfectly. I did however forget to order the plate and lock nut so don't forget those when you order this part. Used with Mil spec Magpul MOE butt stock and the fit is very good will no rattling.
Nice part, well made, good value(20/06/2010)
I used this buffer tube and castle nut in building a lower receiver. The tube is well made and has a good fit and excellent finish.
I was originally looking for parts at the local gun show and couldn't find anything with better quality or finish. Even better, the price from Brownells was also less expensive by about $10.
Good tube(11/02/2011)
Great price and it has a nice tight fit with a Magpul MOE stock.
Mil spec tube(07/09/2011)
Found a great deal on an MOE stock but had the wrong buffer tube, this was a cheap fix. also remember to measure, my commercial stock had the mil spec features, but was the wrong size.
THE BEST TUBE AVAILABLE(21/09/2011)
I've been doing a few AR builds and when the time came to find an extention tube, I looked around, checked the reviews and eventually bought this one. I was concerned about the price at first; usually cheaper doesn't mean better and this one's almost half the price of the others I looked at. I liked that it was .003" over in diameter so my stock wouldn't rattle. When I got it I was surprised by how well it's made and after I installed it on my Magpul M.O.E. I was very happy. No rattle at all. Later I bought another for a Magpul A.C.S. and you can't get a better fit than that one. All in all a great tube and really well made also. Don't be fooled by the price, that's just an added bonus. This tube is the best.
Works well with Troy MOD 1 for M14/M1A!(25/10/2011)
used this for my Troy MOD 1 M14/M1A build, and it works perfectly!
Real Deal(23/11/2011)
Works great and no rattle from MOE stock. I have never seen one that fits as well as this does with so nice of a finish.
If you like it tight, almost too tight(06/02/2013)
Almost difficult to move my Vltor stock out of its closed position, but I guess to tight is better than too loose.
super(10/09/2013)
snug fit is great. I wish I had this a long time ago.
Great RE!(05/02/2014)
Finish is superb, fit is fantastic. Fit w/stock is superb, zero rattle/wobble (except fully closed, which seems to be an STR thing). This will be my go to RE from now on.
dissapointed(26/03/2014)
nice finish, looks very nice, however.... all the other reviews raved about how snug their mil spec stocks fit on this tube but mine was not the case. Ordered a mil spec MOE stock to go with it, fits loose and rattles more than my commercial MOE stock and tube. (and yes I did verify that the stock was mil spec dimentions)Over all a decent part at a good price but don't expect more.
Essential for Slide Fire Stocks!(12/04/2014)
This is the mil-spec buffer tube that you need to install any one of the Slide Fire stocks to simulate automatic fire. Of course it doesn't come with the castle nut, buffer, plate or spring. It is the correct outside diameter to allow the stock to slide freely. It's a very nice tube for the money and should last for years. Make sure to buy lots of ammo!!!
Beware of use with tight fitting stocks(08/12/2015)
My Mission First Minimalist stock won't fit over this buffer tube but does fit over the tube on my Colt LE6920.
The problem is the stock is designed for a tight fit which means it has a smaller inside diameter than mil spec and this buffer tube is designed for a tight fit which means a bigger outside diameter ( .003") than mil spec. Put the two together and they don't fit.
Supposed to be "rattle proof"(14/12/2017)
I purchased this item for a bolt action application and wanted a good fit. It isn't oversized! Mine was actually undersized when compared to a standard milspec tube and has major "rattle". This may be why it was sold at such low priced. Asked for a refund... -no word yet.
Too tight for milspec Magpul Stock (31/12/2017)
This receiver extension tube was too tight of a fit on for a milspec Magpul ACS stock. The stock will fit on, but is too tight to slide freely when released. Same stock slides as it should on three other receiver extensions.
Receiver extension worked with a standard buttstock that had more play in it.
Good quality tube(04/01/2018)
This tube fit with normal small amount of play on Colt M4 carbine and Magpul CTR stocks. Solid construction and finish.
DSA extension tube(10/03/2018)
I've purchased three of the DSA buffer extension tubes. I'm using Magpul CTR stocks and each have fit perfectly. The Magpul lock up design snugs the stock to the extension tube and there is zero rattle or play. Very nice set up in my opinion. I'll buy more when the need arrives. I recommend.
Made in USA
US export classification: 0A501.y.1
This item is controlled by the U.S. government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. It may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.
Upgrade your AR-15 with the D.S. ARMS Mil-Spec Buffer Tube. Durable aluminum construction, matte black finish, and perfect fit! 🔧
M4-style receiver extension tube has six precision-machined notches on the underside for maximum flexibility in setting length-of-pull with adjustable buttstocks. Lets you install a mil-spec stock on a civilian carbine or refit a rifle with an A2-style fixed buttstock with an adjustable M4 stock. Outside diameter of tube is machined approximately .003" oversized for snug, rattle-free fit of stocks designed for mil-spec extensions. Lightly sand interior of stock to get just the right combination of snugness and freedom over movement. Machined from a lightweight aluminum extrusion before hardcoat anodizing with a wear-resistant matte black finish. Rifle conversion also requires a carbine action spring and buffer, available separately.
Customer ratings for D.S. ARMS RECEIVER EXTENSION TUBE
Number of ratings: 20
From brownells.com: 20
Average rating: 4.2
Works with my Magpul Mil Spec MOE Stock(25/12/2009)
Great price, good finish and fit. Works well with my Magpul Mil Spec MOE stock.
Good for price!(04/03/2010)
This is a great stock for the price. However, my only complaint is for Magpul friction lock users. I have a Magpul ACS stock and the friction lock will not lock the sotck up as tight as other stocks. If you don't care about a little wiggle it is no big deal. If you want the Magpul stock to be solid you might try another stock.
Great product(12/03/2010)
I purchased two of these for builds on Aero Precision lowers. The parts were cleanly machined and nicely finished. Threaded perfectly to receiver without play. Best part is that they don't cost an arm an a leg in comparison to other manufacturers offering the same product that does the same job. I will be purchasing more and would certainly recommend. The parts seem to keep in-step to what I have read about DSA quality of manufacturing. Thank you.
Love this Tube(09/04/2010)
I just used this tube for my AR build. It worked perfectly. I did however forget to order the plate and lock nut so don't forget those when you order this part. Used with Mil spec Magpul MOE butt stock and the fit is very good will no rattling.
Nice part, well made, good value(20/06/2010)
I used this buffer tube and castle nut in building a lower receiver. The tube is well made and has a good fit and excellent finish.
I was originally looking for parts at the local gun show and couldn't find anything with better quality or finish. Even better, the price from Brownells was also less expensive by about $10.
Good tube(11/02/2011)
Great price and it has a nice tight fit with a Magpul MOE stock.
Mil spec tube(07/09/2011)
Found a great deal on an MOE stock but had the wrong buffer tube, this was a cheap fix. also remember to measure, my commercial stock had the mil spec features, but was the wrong size.
THE BEST TUBE AVAILABLE(21/09/2011)
I've been doing a few AR builds and when the time came to find an extention tube, I looked around, checked the reviews and eventually bought this one. I was concerned about the price at first; usually cheaper doesn't mean better and this one's almost half the price of the others I looked at. I liked that it was .003" over in diameter so my stock wouldn't rattle. When I got it I was surprised by how well it's made and after I installed it on my Magpul M.O.E. I was very happy. No rattle at all. Later I bought another for a Magpul A.C.S. and you can't get a better fit than that one. All in all a great tube and really well made also. Don't be fooled by the price, that's just an added bonus. This tube is the best.
Works well with Troy MOD 1 for M14/M1A!(25/10/2011)
used this for my Troy MOD 1 M14/M1A build, and it works perfectly!
Real Deal(23/11/2011)
Works great and no rattle from MOE stock. I have never seen one that fits as well as this does with so nice of a finish.
If you like it tight, almost too tight(06/02/2013)
Almost difficult to move my Vltor stock out of its closed position, but I guess to tight is better than too loose.
super(10/09/2013)
snug fit is great. I wish I had this a long time ago.
Great RE!(05/02/2014)
Finish is superb, fit is fantastic. Fit w/stock is superb, zero rattle/wobble (except fully closed, which seems to be an STR thing). This will be my go to RE from now on.
dissapointed(26/03/2014)
nice finish, looks very nice, however.... all the other reviews raved about how snug their mil spec stocks fit on this tube but mine was not the case. Ordered a mil spec MOE stock to go with it, fits loose and rattles more than my commercial MOE stock and tube. (and yes I did verify that the stock was mil spec dimentions)Over all a decent part at a good price but don't expect more.
Essential for Slide Fire Stocks!(12/04/2014)
This is the mil-spec buffer tube that you need to install any one of the Slide Fire stocks to simulate automatic fire. Of course it doesn't come with the castle nut, buffer, plate or spring. It is the correct outside diameter to allow the stock to slide freely. It's a very nice tube for the money and should last for years. Make sure to buy lots of ammo!!!
Beware of use with tight fitting stocks(08/12/2015)
My Mission First Minimalist stock won't fit over this buffer tube but does fit over the tube on my Colt LE6920.
The problem is the stock is designed for a tight fit which means it has a smaller inside diameter than mil spec and this buffer tube is designed for a tight fit which means a bigger outside diameter ( .003") than mil spec. Put the two together and they don't fit.
Supposed to be "rattle proof"(14/12/2017)
I purchased this item for a bolt action application and wanted a good fit. It isn't oversized! Mine was actually undersized when compared to a standard milspec tube and has major "rattle". This may be why it was sold at such low priced. Asked for a refund... -no word yet.
Too tight for milspec Magpul Stock (31/12/2017)
This receiver extension tube was too tight of a fit on for a milspec Magpul ACS stock. The stock will fit on, but is too tight to slide freely when released. Same stock slides as it should on three other receiver extensions.
Receiver extension worked with a standard buttstock that had more play in it.
Good quality tube(04/01/2018)
This tube fit with normal small amount of play on Colt M4 carbine and Magpul CTR stocks. Solid construction and finish.
DSA extension tube(10/03/2018)
I've purchased three of the DSA buffer extension tubes. I'm using Magpul CTR stocks and each have fit perfectly. The Magpul lock up design snugs the stock to the extension tube and there is zero rattle or play. Very nice set up in my opinion. I'll buy more when the need arrives. I recommend.
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