$5,521.07 Colt Model R0920 Product Improvement Program M4A1 Carbine
2010-2021 Afghanistan U.S. Army/U.S. Marines Standard Issue
Features:
1. Forged 7075-T6 aluminum
2. Full steel Weight: 1:1 as real (4,497 kg, 9,91 lbs)
3. Made-to-order hand-crafted Custom GBB Workshop replica exactly according to my specs
4. Custom drilled 3-hole bolt carrier group with Colt C marking and fake retaining pin
5. Complete and detailed laser-marking looking exactly like genuine Colt roll marks, invented and designed by Custom GBB Workshop
6. Custom VFC V1 magazine with V3 valve and real USGI Okay Industries magazine shell
Airsoft parts total cost: $2,658.98
USGI parts total cost: $2,862.09
Location: Europe
10-years of parts hunting.
GBB parts list:
- Custom GBB Workshop ESD ER15 FORGED 7075-T6, Type III hardcoat anodizing
- Custom GBB Workshop VFC M4 upper, correct shape
- DNA steel heavy profile barrel
- DNA steel F-marked front sight base
- Real spec thread DNA A2 birdcage steel flash hider
- Front side sling swivel mount Colt replica
- Ma-Tech BUIS replica
- New Age full steel fully functional forward assist
- SOMOGEAR AN/PEQ-15, 1:1 functional
Real steel/USGI parts list:
- USGI Capco M4 RAS lower
- USGI P&S Products M4 RAS upper
- USGI 3-piece early type Trijicon TA91 killFLASH with light interference filter unit
- USGI Trijicon eye piece and objective lens cap cover
- USGI ACOG TA31 M150 RCO
- USGI Colt charging handle assembly
- USGI Colt 4-position receiver extension
- USGI FN M4 collapsible stock
- Colt 4 F marked A2 pistol grip
- USGI SureFire M952 Kit01 with FM63 IR filter
- USGI P&S Products forward pistol grip
- USGI surplus Okay Industries magazine
- Standard issue Vickers sling
- USGI surplus gutted paracord 550
- Colt magazine catch
- Colt release button
Every part marked as 'USGI' has proven U.S. govt. history and was originally issued to the U.S. Army. This specific M150 RCO Trijicon ACOG has a documented history of U.S. government issue and use in Afghanistan.
Repost due to some details change.
Big thanks and absolute respect to the Custom GBB workshop! We spend hours of messaging about how it should be done. Bro must've had a massive headache because of me.
https://customgbb.blogspot.com/2026/08/us-army-colt-m4a1-pipesd.html?m=1