VKTR VK1 Complete Lower (Ambidextrous)

The VKTR VK1 Complete Lower is the ambidextrous foundation from VKTR Industries' piston-driven rifle program, now sold as a stand-alone receiver for builders rather than only with complete rifles. The receiver is shipped fully assembled with a Hiperfire 4.5 lb single-stage trigger, VKTR Tactical ambi selector, billet stainless mag release, and a patented dual-use bolt catch-and-release paddle that drops the bolt or locks it back from either side without leaving fire control.

VKTR machines every contact control from heat-treated stainless billet rather than the usual MIM steel, which raises rigidity at the magazine release, selector detents, and bolt paddle relative to mil-spec parts kits. The receiver extension is a six-position mil-spec carbine tube with a patented heavy-duty buffer retainer that uses an angled strike face to resist deformation under suppressed and forced-reset-trigger use, the two operating conditions VKTR explicitly calls out as design targets.

Configuration options at order time include buffer tube only, a Magpul SL-M collapsible stock, or an SBA3 stabilizing brace, all with a Magpul K2 grip installed. The receiver is finished in Armor Black with FDE, Sniper Grey, Operational Field Camouflage, and Green available as upcharges. Standard lead time is 8 to 10 weeks direct from VKTR, with faster availability from participating dealers and distributors.