In 1985, the LAPA concern made and association with the metallurgical company Haga (manufacturer of door locks, hinges, etc.), of Nova Friburgo, Rio de Janeiro State, and a new group was formed, ENARM – Empresa Nacional de Armas. Another Nelmo Suzano design came up and materialized as one more interesting prototype. Simply called the MSM (Mini Sub Metralhadora, Mini Submachine Gun), design work on this 9x19mm gun started in February of that year and a prototype was ready by December. Once again, the designer counted on his long-time friend Luiz Gonçalves’ help in this new venture.
Needless to say, the weapon was clearly inspired by the U.S. Ingram/MAC/Cobray family, consisting of a rectangular body primarily made of stampings, a wrap-around bolt of the same shape, and a 32-round magazine (curved and of polymer construction, though) inserted in the centrally-located pistol grip. The non-reciprocating cocking piece was a button on top of the receiver. The retracting stock was a two-rail job with a polymer buttplate. Operation was conventional blowback firing from the open-bolt position (fixed firing pin on the bolt head). Ejection was to the right.
The MSM offered a somewhat novel departure in the ergonomics department. In addition to a somewhat conventional polymer pistol grip, with a finger rest on the forward end of the trigger guard, the operator could alternatively opt for fitting the gun with a pistol grip unit that also featured an integral forward grip expected to give better controllability, mainly in full-auto fire. The grip units were retained by three pins and could quickly be attached/detached. For the record, the gun offered a relatively low cyclic rate of fire, in the region of 600 rounds per minute.
Specifications: barrel length (4 grooves, RH), 150mm; overall length (stock extended/retracted), 500/310mm; gun weight with empty magazine, 2.4kg.
Internal disruptions (oh, partners, partners) in the newly-formed company kept the MSM from undergoing official certification tests and, consequently, from being able to be offered for sale. The ENARM concern was disbanded some time later.