lowerkit
Small Pin Lower Parts kit
Lower Parts Kits

Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.

The lower parts are made by various military contractors, for example the fire control parts, mag catch, detents, and pins are made by the same contractors that Colt use.  Bolt catches and selectors are made by the same contractor that supplies most name brand vendors.  They are made to military specs other than the AR vs M-16 dimensions on the fire control parts.  The fire control parts for the M-16 rifle come from the same manufacturer as made for the M-16 rifle.  Everything is first rate parts, not seconds, and made in the U.S.A.

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AR-15 Small Pin Lower Parts Kit
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AR-15 Small pin lower parts kit from Double Star.

Double Star AR-15 Lower Parts Kit Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.

Large Pin Lower Parts Kit
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Large Pin Lower Parts Kit.

This Lower Parts Kit is for the Large Pin (.170") Typically Colt Brand SP1 Receivers.  Please check the pin size before ordering.

Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.

Small Pin Lower parts with two stage trigger
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Lower parts kit with two stage trigger upgrade.

Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.

Small pin with Jewell two stage trigger
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Small pin lower parts kit with Jewell two stage trigger upgrade.

Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.

Large pin lower parts kit with Jewell two stage trigger upgrade
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Large pin lower parts kit with Jewell two stage trigger upgrade.

Includes everything that goes inside your stripped lower receiver. Includes fire control group, the pins and springs for the fire control group, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents,  A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring.