GP-MEB018 GP705B--->Taper -For Marui M4 / M16 Series -For M4A1 Extended Battery Buttstock (GP416 / GP417 / GP418) Package Included: -New Dust Cover Set -New Bolt Cover -Metal Hop-Up Set -Receiver Pin Set -Forward Assist Knob
GP-MEB019DE MEB012DE--->Taper -For Marui M4 / M16 Series -For M4A1 Extended Battery Buttstock (GP416 / GP417 / GP418) Package Included: -New Dust Cover Set -New Bolt Cover -Metal Hop-Up Set -Receiver Pin Set -Forward Assist Knob
GP-MEB019BK MEB012BK--->Taper -For Marui M4 / M16 Series -For M4A1 Extended Battery Buttstock (GP416 / GP417 / GP418) Package Included: -New Dust Cover Set -New Bolt Cover -Metal Hop-Up Set -Receiver Pin Set -Forward Assist Knob
GP-GBX010B -For G&P M249 Conversion Kit Series Included: -8mm Bearing Gearbox -7mm Bearing -8mm Bearing -190% Spring -Metal Cylinder -Bearing Cylinder Head -Nozzle -Bearing Spring Guide -Metal Piston -Bearing Gears -Tappet -High Flux Electronic switch -Trigger -Safety Set -Selector
GP-GBX010A -For G&P M249 Conversion Kit Series Included: -8mm Bearing Gearbox -7mm Bearing -8mm Bearing -150% Spring -Metal Cylinder -Bearing Cylinder Head -Nozzle -Bearing Spring Guide -Metal Piston -Bearing Gears -Tappet -High Flux Electronic switch -Trigger -Safety Set -Selector
GP-GBX009B -For Marui M14 Series & G&P M14 DMR & EBR MK14 Mod O Conversion Kit Series Included: -7mm Bearing Gearbox -7mm Bearing -190% Spring -Metal Cylinder -Bearing Cylinder Head -Nozzle -Metal Spring Guide -Metal Piston -Bearing Gears -Tappet -High Flux Electronic switch -Trigger -Safety Set -Selector
GP-GBX009A -For Marui M14 Series & G&P M14 DMR & EBR MK14 Mod O Conversion Kit Series Included: -7mm Bearing Gearbox -7mm Bearing -150% Spring -Metal Cylinder -Bearing Cylinder Head -Nozzle -Metal Spring Guide -Metal Piston -Bearing Gears -Tappet -High Flux Electronic switch -Trigger -Safety Set -Selector
GP-GBX008B -For G&P EBR MK14 MOD I Conversion Kit Series Included: -7mm Bearing Gearbox -7mm Bearing -190% Spring -Metal Cylinder -Bearing Cylinder Head -Nozzle -Metal Spring Guide -Metal Piston -Bearing Gears -Tappet -High Flux Electronic switch -Trigger -Safety Set -Selector
GP-OTH037 -With Aluminum Screwdriver & Screw Base -With Hard Steel Screw x 4
-WP193 -Only for Magpul Gas Blowback Magazine