Grand Power Stribog SP9 A3SG w/ Folding Buttstock 9mmDescription For easy concealability the shortest SP9 A3SG version is available, measuring just 316 mm with the stock folded (without a muzzle device). All internal parts have been designed for reliable function even with a short barrel. The SP9 A3SG is tted with a threaded barrel with a protective end cap, utilizing a 1 228 thread pitch. An FRN folding stock may be replaced by an end cap to further increase concealability. For such a small package we