#define CustomMuzzle(%0) (pev(%0, pev_impulse) == g_iszMuzzleKey)
#define Sprite_SetScale(%0,%1) set_pev(%0, pev_scale, %1)

// CSprite
#define m_maxFrame 35

// Muzzle Flash
#define MUZZLE_TIME 0.06 // Время обновления спрайта Muzzle Flash
#define MUZZLE_SPRITE "sprites/x/muzzleflash_plasma.spr" // Это наш Muzzle Flash. Меняете его на свой
#define MUZZLE_CLASSNAME "ent_mf_wpn" // Сюда пишем название для нашей энтити с Muzzle Flash'ом
#define MUZZLE_INTOLERANCE 100

new g_iszMuzzleKey;

RegisterHam(Ham_Think, "env_sprite", "CMuzzleFlash_Think_Pre", false);

// Muzzle Flash
engfunc(EngFunc_PrecacheModel, MUZZLE_SPRITE);

g_iszMuzzleKey = engfunc(EngFunc_AllocString, MUZZLE_CLASSNAME);

stock Sprite_SetTransparency(const iSprite, const iRendermode, const Float: flAmt, const iFx = kRenderFxNone)
{
	set_pev(iSprite, pev_rendermode, iRendermode);
	set_pev(iSprite, pev_renderamt, flAmt);
	set_pev(iSprite, pev_renderfx, iFx);
}

stock Weapon_MuzzleFlash(const iPlayer, const szMuzzleSprite[], const Float: flScale, const Float: flBrightness, const iAttachment)
{
	if (global_get(glb_maxEntities) - engfunc(EngFunc_NumberOfEntities) < MUZZLE_INTOLERANCE)
	{
		return FM_NULLENT;
	}
	
	static iSprite, iszAllocStringCached;
	if (iszAllocStringCached || (iszAllocStringCached = engfunc(EngFunc_AllocString, "env_sprite")))
	{
		iSprite = engfunc(EngFunc_CreateNamedEntity, iszAllocStringCached);
	}
	
	if(pev_valid(iSprite) != 2)
	{
		return FM_NULLENT;
	}
	
	set_pev(iSprite, pev_model, szMuzzleSprite);
	set_pev(iSprite, pev_spawnflags, SF_SPRITE_ONCE);
	
	set_pev(iSprite, pev_classname, MUZZLE_CLASSNAME);
	set_pev(iSprite, pev_impulse, g_iszMuzzleKey);
	set_pev(iSprite, pev_owner, iPlayer);
	
	set_pev(iSprite, pev_aiment, iPlayer);
	set_pev(iSprite, pev_body, iAttachment);
	
	Sprite_SetTransparency(iSprite, kRenderTransAdd, flBrightness);
	Sprite_SetScale(iSprite, flScale);
	
	dllfunc(DLLFunc_Spawn, iSprite)

	return iSprite;
}

public CMuzzleFlash_Think_Pre(const iSprite)
{
	static Float: flFrame;
	
	if (pev_valid(iSprite) != 2 || !CustomMuzzle(iSprite))
	{
		return HAM_IGNORED;
	}
	
	if (pev(iSprite, pev_frame, flFrame) && ++flFrame - 1.0 < get_pdata_float(iSprite, m_maxFrame, 4))
	{
		set_pev(iSprite, pev_frame, flFrame);
		set_pev(iSprite, pev_nextthink, get_gametime() + MUZZLE_TIME);
		
		return HAM_SUPERCEDE;
	}

	set_pev(iSprite, pev_flags, FL_KILLME);
	return HAM_SUPERCEDE;
}

Weapon_MuzzleFlash(iPlayer, MUZZLE_SPRITE, 0.1, 255.0, 1); // Индекс игрока, Спрайт, Размер, Яркость, Аттачмент выстрела (от 0 до 3, подбирайте сами)