S'G'
Found both this and the Standard Products carbine (in the companion post) on GunBroker for sale by my local gun shop. They happened to be the last two makers that I needed to complete the 11 manufacturing variants, so I bid to win.
(https://i.ibb.co/XjmpvYK/01-left-full.jpg) (https://ibb.co/WGSFYVM)
(https://i.ibb.co/NZbYz88/02-left.jpg) (https://ibb.co/vZRz877)
(https://i.ibb.co/sjZXqR9/03-left.jpg) (https://ibb.co/TcsNt2M)
(https://i.ibb.co/zRyLgnD/04-left.jpg) (https://ibb.co/Snh1gsG)
(https://i.ibb.co/ZLt95vB/05-left.jpg) (https://ibb.co/HF1Z6Rt)
(https://i.ibb.co/QmpyxpV/06-right-full.jpg) (https://ibb.co/w6B52Bq)
(https://i.ibb.co/P178Jn2/07-right.jpg) (https://ibb.co/TPV5JSQ)
(https://i.ibb.co/gwBJ1QR/08-right.jpg) (https://ibb.co/7V6KcB1)
(https://i.ibb.co/dtT65MY/09-right.jpg) (https://ibb.co/kJ70SBC)
(https://i.ibb.co/4mBGwNq/10-right.jpg) (https://ibb.co/bWpZjd0)
(https://i.ibb.co/4jfdRDt/11-SN-3575399.jpg) (https://ibb.co/NL3S2kC)
(https://i.ibb.co/99qxmMG/12-US-Carbine-Cal-30-M1.jpg) (https://ibb.co/d0QNsh7)
(https://i.ibb.co/xYbSkVM/13-barrel-PW-Winchester-1-3.jpg) (https://ibb.co/DYFDJ37)
(https://i.ibb.co/zbpbLmy/14-top-rear.jpg) (https://ibb.co/nf9fVwH)
(https://i.ibb.co/vdkBHrc/15-top-mid.jpg) (https://ibb.co/VCTNthL)
(https://i.ibb.co/pPwrY7c/16-top-front.jpg) (https://ibb.co/N3Cncv5)
(https://i.ibb.co/7nGg6Yq/17-Bolt-group-disassembled.jpg) (https://ibb.co/wSKJx0f)
(https://i.ibb.co/1XS4jDX/18-Bolt-group-lug-AI.jpg) (https://ibb.co/yk3x7wk)
(https://i.ibb.co/frZSVLH/19-Bolt-group-lug-6.jpg) (https://ibb.co/xzwsKd6)
(https://i.ibb.co/tmTryqz/20-Bolt-group-FP-I.jpg) (https://ibb.co/5MgHqrk)
(https://i.ibb.co/MnCwqcZ/21-Bolt-group-extractor-W-I.jpg) (https://ibb.co/5TRpqrG)
(https://i.ibb.co/sHNPQFk/22-stock-R-SG.jpg) (https://ibb.co/k1wy0hk)
(https://i.ibb.co/rQv8K18/23-recoil-plate-W-S-G.jpg) (https://ibb.co/fXQ6VP6)
(https://i.ibb.co/sgBW3F5/24-Handguard-R-SG.jpg) (https://ibb.co/dfhmKQb)
(https://i.ibb.co/j6dgsPc/25-Op-slide-S-G.jpg) (https://ibb.co/Vjd25c7)
(https://i.ibb.co/tDg6CY4/26-Trigger-group-body-S-G.jpg) (https://ibb.co/KWdgyVX)
(https://i.ibb.co/ThNLPTx/28-Trigger-group-sear-S-G.jpg) (https://ibb.co/dKHgkcw)
(https://i.ibb.co/t81KQCh/27-Trigger-group-hammer-SW.jpg) (https://ibb.co/ZWbXGTJ)
(https://i.ibb.co/ZdMsjW9/29-CMP-booklets.jpg) (https://ibb.co/H7HvSnZ)
(https://i.ibb.co/D8g3m7d/30-CMP-Certificate.jpg) (https://ibb.co/BrK8vgk)