FN Five-seveN MK3 MRD 5.7x28mm vs PSA Rock 5.7 5.7x28mm

Both are full-size 5.7x28mm pistols with polymer frames, two magazines each, and they weigh within 0.2 oz of one another (25.2 oz for the FN Five-seveN MK3 MRD 5.7x28mm, 25.0 oz for the PSA Rock 5.7 5.7x28mm). Dimensions are close too: 8.2" vs 8.07" overall and 4.8" vs 4.7" of barrel. The differences are the action and the price. The Five-seveN is single action with an ambidextrous frame safety and is optic-ready; the Rock is striker-fired with a trigger safety and striker block, is not cut for an optic, and uses Glock-compatible sights. The Rock holds 23+1 to the Five-seveN's 20+1 and lists a much lighter 3.5 lb trigger against 6.2 lb. MSRP is $499 for the Rock and $1,509 for the Five-seveN.

Pick the FN Five-seveN MK3 MRD if:

• You want a factory optic cut rather than paying to have a slide milled
• You want a single-action trigger with a manual ambidextrous frame safety
• You want an adjustable rear sight and a photo-luminescent front

Pick the PSA Rock 5.7 if:

• MSRP is $1,010 lower ($499 vs $1,509)
• You want three more rounds (23+1 vs 20+1) and a 2.7 lb lighter listed trigger (3.5 lb vs 6.2 lb)
• You want Glock-compatible sight cuts and a slimmer 1.25" slide vs 1.35"

Size, weight and barrel length are effectively the same gun on paper. The choice is the Five-seveN's optic cut and manual-safety single-action setup against a $1,010 lower MSRP, three more rounds and a lighter trigger.