Ah yes, Rainbow 6 Siege's 6P41, or the Bullpup variant of PKP Pecheneg.

Quite interesting and rare gun in games though, as right now it only appears on Rainbow Six Siege, Black Squad, World War 3, and recently Battlefield 2042, so yeah, I've decided to port it, with multiple bodygroups and bones to adjust.

SFM version:
https://steamcommunity.com/sharedfiles/filedetails/?id=2739933481

Includes:
r6s\r6s_lmg_6p41.mdl
r6s\r6s_lmg_6p41_ironsight.mdl
r6s\r6s_lmg_6p41_laser.mdl
r6s\r6s_lmg_6p41_mag.mdl
r6s\r6s_lmg_6p41_mag_2.mdl
r6s\r6s_lmg_6p41_russian_reflex.mdl
r6s\r6s_lmg_6p41_suppressor.mdl
r6s\r6s_lmg_6p41_vertical_grip.mdl

Credits :
Tom Clancy - The original author of Rainbow Six series of novels
Ubisoft/Ubisoft Montreal - Creator of Rainbow Six Siege and the assets.
floxay - Asset rips.
P3DM.RU - Hosting the files.
NeoLin - Porting to Source, Promo Art.