May 1, 2008 · When zeroing the M4 at 25m, set the BDC to 6/3 +2. Make all your elevation changes on the front sight so the BDC will work. Center your group in the lower half of the center bullseye. At …

Jan 7, 2026 · Is the M4 carbine a “retro” configuration now (Page 1 of 2) Previous Page / 2 Next Page

Jul 10, 2006 · They have M4 barrel extensions and have the same profile as an A2 barrel, just 4" shorter. Normal mid length handguards are 9", so a 9.5 rail won’t cover much of the has block.

Jun 11, 2025 · A1 upper with or without M4 feed ramps - is it necessary? 1st retro build, and all my other upper receivers have had M4 feed ramps. My build is based of a Carbine. I have read mixed reviews …

Dec 28, 2016 · M4 feed ramps will be up to the mfg. A military M4 barrel is similar to a 20" A2 barrel, with about 5.5" removed between the chamber area and the gas block/fsb, M4 feed ramps, and a …

Jun 27, 2015 · Hi Folks,A forum member asked me if I would give some insight into how our M4's handle on the range because I've started threads on the AK's, pistols and .50 Barretts.Here's a little …

May 14, 2024 · Here's my M4A1 clone. EDIT: Actually just an M4 clone as I just learned. Always thought the flat top upper came in with the A1 upgrade but apparently that was an XM4 to M4 …

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Apr 25, 2024 · [ARCHIVED THREAD] - Surefire M500A CAR-15 / M4 Carbine Dedicated Forend Light 4/24/2024 11:57:22 PM EST

Jul 24, 2024 · Quote History Quoted: The swivel itself is the same as on an A2 butt stock, but the screw is shorter. I had no idea it was the same as the A2 swivel. Thanks for that info. This forum is so …