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

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 …

Jul 27, 2025 · FYI, a M4 extension will work just fine in a receiver not cut for the extension. The only problem is when you run an extension with out M4 ramps in a receiver with M4 ramps cut into it. This …

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Mar 7, 2025 · Here's a Colt R0933 date 11/6/96 has M4 feed ramps with no M4 stamp by gas tube hole. I believe Colt started adding M4 feed ramps in the early 90's. Attached File

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 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 …

Aug 8, 2024 · 3. Tippmann M4-22 4. JP Rifles JP-22R The Tipmann higher end is about a $750 rifle. A 10/22 race gun will run that much and more, so I think the 10/22s are just better known/easier …

Jun 15, 2025 · Curious to see who is running some form of forced reset with a 22LR. Either a drop in cassette style or super safety style. Interested to know what you are using (trigger), what upper, …