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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly

Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black SI-AR-RE7P-KIT-BK
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED
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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red SI-AR-RE7P-KIT-RED

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Questions & Answers
Customer Reviews
Most Recent Reviews
Si Buffer tube by Scooter, Verified Owner, January 8, 2018
Great product! I really like the extended detent tab. Makes for a secure install. Tube comes with a castle nut and endplate with variable sling mounts. I didn't use this piece and went for a simpler QD endplate. 7 positions for a bit more versatility...
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Most Recent Reviews
Buffer Tube kit by Edwin Sandoval, Verified Owner, December 17, 2017
Excellent buffer tube with all the right cuts including a lock on the detent pin for perfect fit, the end plate has multiple various sling mounting options all in one. Great buffer kit I really recommend it I'm very happy with it, great price and bes...
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Most Recent Reviews
SI Buffer tube by Andy, Verified Owner, October 5, 2017
It looks really nice. The red is a little bit darker than the pictures show but I really do like it. I would definitely recommend this buffer tube to others. Not much else to say really it is a buffer tube.
Most Recent Reviews
Excellent product, little off on color match by Hal Skaggs, Verified Owner, August 11, 2017
I was asked to build a firefighter themed AR with red accents. I chose Spike Industries for the parts because of their solid reputation and to get a consistent color match on all the parts. The buffer tube came with a very useful end plate and a cas...
Read More...
Read All 4 Reviews

Product Discontinued by Manufacturer

Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly has been discontinued by Strike Industries and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Lower Parts, AR15 Buffer Assemblies yourself to try and find the perfect replacement for you!

Product Info for Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly

Independent Review Strike Industries is proud to introduce our improved 7-position (That's right not 6 position but 7) Aluminum receiver extension MIL-SPEC diameter buffer tube. It will allow users to have finer control of their length of pull. If you have ever felt that your length of pull was in between two settings on a standard buffer tube, this is for you! The tube's shortest length of pull position is as compact as a fully collapsed M4 carbine butt stock while its longest 7th position stretches the stock to be slightly longer than that of an M16A2 fixed stock. Our end plate is jam packed with loads of features. The first one being a quick detach (QD) build into it for true ambidextrous shooting. It also incorporates easy attachment points on both sides for slings so you can use just about any sling on the market. This kit also comes with a receiver nut for collapsible receiver extension, also referred to as a Castle Nut. This mil-spec part with fit both the mil-spec and commercial receiver extensionsimage

Package Contents:

  • Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly

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Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Black, SI-AR-RE7P-KIT-BK , MPN: SI-AR-RE7P-KIT-BK , UPC: 700371179205 , Code: 3Q-BFA-SIARM16REXT-SI-AR-RE7P-KIT-BK
  • Strike Industries SI-AR-15/M16 Receiver Extension,7 Position Assembly, Red, SI-AR-RE7P-KIT-RED , MPN: SI-AR-RE7P-KIT-RED , UPC: 708747545913 , Code: 3Q-BFA-SIARM16REXT-SI-AR-RE7P-KIT-RED
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Last updated 2026-07-10 UTC.