G&P MOTS 12 inch Keymod MRE for WA M4 GBB (Black) google This One-Piece Metal Chamber Set

This One-Piece Metal Chamber Set is more durable and accurate in feeding BB

Hi-Cap Magazine for M4 AEG (Black

Prometheus Airsoft AEG Upgrade Part Series -- Metal Chamber NEO --  ~ For Marui M-Series Gearbox V

and in this case

Pistol Grip & Foregrip this AEG is entirely metal  Main Features:  -MK18 Mod O Metal Body (GP703)  -DD MK18 RIS II  -M16 Magazine (130rds) (GP094)  -Flash QD Flip Up Sight (GP228)  -Military 600m Flip Up Rear Sight (GP254)  -M4A1 Extended Battery Buttstock (Black) (GP416)  -Stubby Raider Foregrip (Black) (GP887B)  -RAS Slim Rail Cover (Black) (GP413)  -T-Shape Connector Wire Set For Recharge  - Manual  Recommend to use 7

G&P MOTS 12 inch Keymod MRE for WA M4 GBB (Black) google This One-Piece Metal Chamber SetG&P MOTS 12 inch Keymod MRE for WA M4 GBB (Black) Full Metal Construction For G&P GBB Metal Body & WA M4A1 Series 20mm Top Rail & 20mm Under Rail (Length: 35mm) With Keymod System Length: 305 mm