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Page AR-15 » Build It Yourself
AR Sponsor: bravocompany
Posted: 10/22/2016 3:24:29 PM EDT
LOOKING FOR SOME INFO.
I HAVE AN S&W M&P15 SPORT. HAS A PINNED ADJUSTABLE STOCK PER MASSACHUSETTS LAW WHEN PURCHASED. BARREL IS 16".
CHANGING TO A 20" BULL STAINLESS BARREL UPPER WITH RIFLE GAS TUBE. USING A CRYPIC BCG.
DO I NEED TO CHANGE OUT CARBINE STOCK TO A RIFLE STOCK AND ALSO SPRING AND BUFFER ALONG WITH THE BUFFER TUBE.

THANKS IN ADVANCE FOR ANY HELP I CAN GET.

JACK COURTNEY.
Link Posted: 10/22/2016 3:42:17 PM EDT
[#1]
I would think that if there is a problem, it could be corrected by using a heavier buffer such as a H or H2, allowing you to keep your carbine stock.  This link goes into the differences.

http://www.m4carbine.net/showthread.php?14372-H-vs-H2-vs-H3-buffers
Link Posted: 10/22/2016 5:20:53 PM EDT
[#2]
Should be zero problems with your carbine buffer and tube.
Page AR-15 » Build It Yourself
AR Sponsor: bravocompany
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