I believe the Bulltrigg does that.......
--------------------------------------------------------------------------------------------------------
My prize VSR-10
Base Gun Tokyo Marui VSR-10 G-SPEC
Power System Old Style Wolverine Bolt
Power System Upgrades Airsaver spring with 2 shims
Cylinder Wolverine Aluminum Cylinder
Barrel Airsoft Philosopher 6.04X475mm
Bucking Airsoft Philosopher 40º
Chamber Airsoft Philosopher CNC Chamber
Barrel Spacers 10 Spacers Made Of Solid Masking Tape
Mag Release Angel Custom (its really good!!!)
Banananananananana Spartan Doctrine 40mmX335mm With Special Cream
Battery Titan Power 7.4V X 350mah HPA Battrey
BBs BLS .45, BLS .48, Novritsch .46
DIY Mods
Stock Filled With Old Socks, Leather, Tape and Foam, Cylinder To Barrel Guide Sleeve Made Of A Seltzer Bottle, Dust Cover Made Of An Arizona Can, Short Stroked Cylinder, 90º Airline Fitting, 1/4 Extra Strong Airline
Future Upgrades
Homemade 5,000PSI Airstock, Carbon Fiber Outer Barrel, AirsoftPro Receiver, Maple Leaf Bolt Handle, Palmer's Pursuit Dual Regulators, First Strike First Stage Regulator, IER-Hop, Delrin Cylinder Sleeve, And A Possible Skeleton Stock Sort Of Like Plazmaburn's VSR-X
Where you can see my projects and related pictures
https://www.instagram.com/silicone_sword/?hl=en