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Posted: 2/9/2026 8:02:36 PM EDT
| Looking to see if anyone has tried a CMMG 45 acp radial blowback upper on a TWH grease gun lower? |
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Yes it will but, you'll probably have to adjust feed lips.....and it probably won't feed HP ammo....can be corrected But requires removing the barrel extension and reprofiling the actual feed cone of the barrel. The 45 CMMG was based off the feed profile of my Gen 1 DI45, and I KNOW the Gen 2 feeds both on the CNC AR-45 lower, My Gen 1 was designed around that lower, in the early days I didn't test with HP ammo. Rudy |
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I've been trying to figure out what a TWH GG lower was. Doing a Google search, I don't see where you can buy one. I see this old ad: https://www.gunsinternational.com/guns-for-sale-online/rifles/ar15-rifles/twh-enterprises-ar-45--45-acp-cal---comes-with-6-32-round-grease-gun-mag-s--999--cond-.cfm?gun_id=102401218 Looking at the pics, it looks like the old CNC guns lower: https://www.cncguns.com/projects/AR45lower.html I use an old MGI (now Hydra) GG Magwell: https://c3junkie.com/?page_id=841 I run mine in full auto and it runs even with SWC:  I also modified mine like this: 
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