PKM, M60, M1918 ironsight fixes

[Bread]

Not really a bug, not really a suggestion, so Im putting this here so rang doesnt forget 
(Will fix the ADS for these weapons, everything else needs to be finished on the testing server! I partially did that with igneous, but we never finished it because of a sound issue. Rang, lemme know when you have free time to finish that up with me!)

-- M1918 (put in the tfa_m1918bar file in lua/weapons)
SWEP.BlowbackBoneMods = {
    ["bolt"] = {
        scale = Vector(1, 1, 1),
        pos = Vector(-0.181, -0.181, 0.18),
        angle = Angle(0, -3.254, 0)
    }
}

-- M60 (put in the tfa_m60 file in lua/weapons)
SWEP.BlowbackBoneMods = {
    ["Emm60_Pairof"] = {
        scale = Vector(1, 1, 1),
        pos = Vector(-0.181, -0.181, 0.18),
        angle = Angle(0, -3.254, 0)
    }
}

-- PKM (put in the tfa_pkm file in lua/weapons)
SWEP.BlowbackBoneMods = {
    ["bolt"] = {
        scale = Vector(1, 1, 1),
        pos = Vector(-0.181, -0.181, 0.18),
        angle = Angle(0, -3.254, 0)
    }
}