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

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Mar 19, 2010 · CPM-M4: A high-speed tool steel, this is a really tough steel with good edge retention. Again, not common among production knives. S30V is BY FAR the most common of these. It is a …

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 10, 2023 · Just wondering what aftermarket triggers you guys have used?Doing some research, resulted in very limited info. Some guy on rimfire site reported that the SSA-E didn’t work because …

Dec 1, 2016 · The M4 trigger body has larger disconnector spring pockets, so requires larger-base disconnector springs. The M4 burst cam is shiny and is referred to as a "cam, control" instead of …

Jun 8, 2023 · [ARCHIVED THREAD] - Best Benelli M4 Bolt release 6/8/2023 1:00:06 PM EST ... 6/8/2023 2:58:23 PM EST [#1]

Mar 26, 2014 · The issue is they are claiming the value PER click is the same from the M16A2/4 to the M4 At 100 meters, 1 click elevation = 1 1/2" (or 3.5cm) point of impact shift on target.