Model Files (.stl, .3mf, .obj, .amf) DOWNLOAD ALL FILES Summary I can’t test fit this but the main components are the same as the tested FGC-9 one so it should be alright... see the... Sports & Outdoor > Other Sports Tags: hsts hybridsquaretube professorparabellum I can’t test fit this but the main components are the same as the tested FGC-9 one so it should be alright... see the manual of the FGC-9 edition for the installation. for a big part will it be the same. there is a DC buttstock added. this means Dust Cover. once the buttstock is fully forward. will it cover up the open section of upper Category: Sport & Outdoors UntangleWORKS Professor Parabellum's HSTS UNW Adjustable Buttstock VIEW IN BROWSER updated 20. 11. 2021 | published 20. 11. 2021 3D MODEL ONLY