SECTION 1. Section 121 of Chapter 140 of the general laws is hereby amended by adding at the end thereof the following new section:

Section _:- No person who, being properly licensed to do so pursuant to Chapter 140 of the general laws, purchased, sold or transferred a weapon or an assault weapon and such transaction was properly submitted and approved under the Massachusetts Instant Record Check System, prior to July 21, 2016 shall be guilty of the unlawful sale, transfer or possession of a weapon or an assault weapon as defined in Section 121 of Chapter 140 of the general laws.

SECTION 2. Section 128B of Chapter 140 of the general laws as appearing in the 2014 official edition is hereby amended by striking in lines 17 the following:-“by a fine of not less than $500 nor more than $1,000” and inserting in place thereof the following:-“by a fine of not less than $1000 nor more than $2,000 or imprisonment of no more than 6 months”

SECTION 3. Section 5. Chapter 265 of the general laws is hereby amended in Section 18B, by adding the following at the end thereof:

, provided, however, that if such person  was not licensed pursuant to Chapter  140 of the general laws, or the firearm was purchased in violation of section 128B of Chapter 140 of the general laws, such penalty shall be increased in each instance by a term of  5 to 10 years