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Hi chris, The difference is 5 round vs 30 round.
Steve P.
8 years ago
Please click the green box stating it as the best answer. We are rated on our answers and are just volunteers, not Buds employees. You can choose more then one Thank you!
Steve P.
8 years ago
5 round mag vs 30 round mag
Randy I.
8 years ago
The SGL-21 has a rolled edge on the receiver cover and the 20 does not. The 21 is actually a little closer to Russian Milspec than the 20. Most people would never notice. Also the SGL20 has a bayonet lug and does NOT have an accessory lug. The SGL21 has both the bayonet lug and the accessory lug. (Other than this, they are similar).
James G.
8 years ago