Glock G42 .380 Auto vs Sig Sauer P365-380 .380 Auto

Both are subcompact .380 ACPs built for deep concealment, but the P365-380 carries four more rounds (10+1 vs 6+1) and ships optic-ready. The Glock G42 has a lighter trigger (5.4 lb vs 6.3 lb) and runs a single-stack design that keeps width at 0.98", 0.12" slimmer than the P365-380. Length, height, and weight are essentially tied.

Pick the Glock G42 if:

• You want a lighter factory trigger pull (5.4 lb vs 6.3 lb)
• You want a single-stack 0.98" frame, 0.12" slimmer than the P365-380, for pocket carry
• You want a Glock manual of arms if you already shoot other Glocks

Pick the Sig Sauer P365-380 if:

• You want 10+1 capacity — four more rounds than the G42 — without going up in size class
• You want a factory optic cut for a micro red dot
• You want the same FCU and manual of arms as the P365 9mm if you carry both

Both are subcompact striker-fired .380 ACPs at nearly identical dimensions. The decision is capacity-plus-optic-cut (Sig) or single-stack slim with a lighter trigger (Glock).